Mitsubishi Electric PLA-RP50 Service Manual download pdf (Page 17)

Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit.

Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below. Check the contents

below before investigating details.

10-1. TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The trouble is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according

to “10-3. Self-diagnosis action table”.

Conduct troubleshooting and ascertain the cause of the

trouble according to “10-4. Troubleshooting by inferior

phenomena”.

The trouble is not reoccurring.

Logged

Not logged

Consider the temporary defects such as the work of

protection devices in the refrigerant circuit including

compressor, poor connection of wiring, noise and etc.

Re-check the symptom, and check the installation

environment, refrigerant amount, weather when the

trouble occurred, matters related to wiring and etc.

Reset error code logs and restart the unit after finishing

service.

There is no abnormality in electrical component,

controller board, remote controller and etc.

Re-check the abnormal symptom.

Conduct trouble shooting and ascertain the cause of

the trouble

according to “10-4. Troubleshooting

inferior phenomena”.

Continue to operate unit for the time being if the cause

is not ascertained.

There is no abnormality concerning of parts such as

electrical component, controller board, remote controller

and etc.

TROUBLESHOOTING

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Mitsubishi Electric PLA-RP50 Service Manual Page 17